Iq13 Partial Blank Image (Periodic) Rap; Iq14 Different Image Density (Left And Right) Rap - Xerox WorkCentre M20 Service Manual

IQ13 Partial Blank Image (Periodic) RAP

Use this RAP when the printed sheets have blank areas that form a regular, or repeated, pat-
tern.
Procedure
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: If necessary, refer to GP 20 for the acronym list and cross reference lists of more com-
monly recognised part names.
Perform the following:
1. Measure the distance between the image and the defect. Refer to Table 1 to determine
the possible cause of the defect.
Table 1 Defect distance
Defect distance Roller
94.3mm ELA - OPC unit drum
38.3mm Charge roller
43.8mm Supply roller
54.3mm Developer roller
51.9mm Cleaning roller
56.6mm Transfer roller
82.6mm Heat roller
91.1mm Pressure roller
Install new components as necessary.
Image Quality
IQ13, IQ14
Component Parts List Ref.
P/O ELA - OPC unit drum PL 9.10 Item 1
P/O ELA - OPC unit drum PL 9.10 Item 1
P/O ELA toner unit set PL 9.10 Item 2
P/O ELA toner unit set PL 9.10 Item 2
P/O ELA toner unit set PL 9.10 Item 2
Transfer roller PL 8.10 Item 33
P/O ELA HOU - fuser PL 9.10 Item 4
assembly
P/O ELA HOU - fuser PL 9.10 Item 4
assembly

IQ14 Different Image Density (Left and Right) RAP

Use this RAP when the printed sheets have different areas of image density across the pro-
cess direction. An example is shown in Figure 1.
Procedure
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: If necessary, refer to GP 20 for the acronym list and cross reference lists of more com-
monly recognised part names.
Perform the following:
1. The transfer roller pressure may be unbalanced. Check the spring pressure at each end,
PL 8.11 Item 6 and PL 8.11 Item 10. Install new components as necessary.
2. Shake the ELA - toner unit set to evenly distribute the toner. Go to GP 1. Engine Test
Mode Entry. Perform the Toner State test. If necessary, install a new ELA - toner unit set,
PL 9.10 Item 2.
3. Go to GP 3. Perform the Clean Drum routine. If necessary, install a new ELA - OPC unit
drum PL 9.10 Item 1.
4. If necessary install a new ELA - toner unit set, PL 9.10 Item 2.
March 2004
3-10
Figure 1 Image density
WARNING
Work Centre M20 Family